Outdoor barbecue grill assembly



FIG. 1 is a perspective view of an outdoor barbecue grill assembly showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a side view thereof;

FIG. 6 is a side view of the opposite side of FIG. 5; and,

FIG. 7 is a bottom view thereof.

The details shown in broken lines form no part of the claimed design. 

We claim the ornamental Design for an outdoor barbecue grill assembly, as shown and described. 